{"id":615,"date":"2016-12-18T03:53:04","date_gmt":"2016-12-18T02:53:04","guid":{"rendered":"http:\/\/astronomy.lamost.org\/blog\/?p=615"},"modified":"2017-08-04T15:22:41","modified_gmt":"2017-08-04T13:22:41","slug":"%e4%b8%80%e4%b8%aa%e5%bc%95%e5%8a%9b%e6%b3%a2%e9%80%9f%e5%ba%a6%e6%b5%8b%e5%ae%9a%e7%9a%84%e6%96%b0%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"http:\/\/astronomy.lamost.org\/blog\/?p=615","title":{"rendered":"PRL:\u4e00\u4e2a\u5f15\u529b\u6ce2\u901f\u5ea6\u6d4b\u5b9a\u7684\u65b0\u65b9\u6cd5"},"content":{"rendered":"<p><span style=\"font-size: small;\">First successful detection of gravitational waves (GW) by LIGO\/Virgo opened up a new window on the Universe and gave us unprecedented possiblities of testing gravity. In particular the issue of the speed of gravity, in General\u00a0\u00a0 Relativity\u00a0 equal to the speed of light, became now accessible for experimental tests. Any observational clue that gravitational waves propagate with speed\u00a0\u00a0 different from c would mark the breakdown of General Relativity.<\/span><\/p>\n<p>In this paper we propose a new method to measure the speed of gravity\u00a0\u00a0 assuming that strongly lensed gravitational signal accompanied by its electromagnetic (EM) counterpart\u00a0\u00a0 could be detected. The method is based on measuring the difference between strong lensing\u00a0\u00a0 time delays registered in <span style=\"font-size: small;\">GW and EM<\/span>. The differential setting of our method makes it robust and free from the intrinsic time delays in the source (i.e. different emission times of GW and EM signal).<\/p>\n<p>Strongly lensed GW signals are expected to be registered by the next\u00a0\u00a0 generation of interferometric detectors like the Einstein Telescope.<\/p>\n<p><a href=\"https:\/\/journals.aps.org\/prl\/abstract\/10.1103\/PhysRevLett.118.091102\">https:\/\/journals.aps.org\/prl\/abstract\/10.1103\/PhysRevLett.118.091102<\/a><\/p>\n<p><a href=\"https:\/\/arxiv.org\/abs\/1612.04095\">arXiv:1612.04095<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>First successful detection of gravitational waves (GW) &#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[],"class_list":["post-615","post","type-post","status-publish","format-standard","hentry","category-21"],"_links":{"self":[{"href":"http:\/\/astronomy.lamost.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/615","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/astronomy.lamost.org\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/astronomy.lamost.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/astronomy.lamost.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/astronomy.lamost.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=615"}],"version-history":[{"count":4,"href":"http:\/\/astronomy.lamost.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/615\/revisions"}],"predecessor-version":[{"id":658,"href":"http:\/\/astronomy.lamost.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/615\/revisions\/658"}],"wp:attachment":[{"href":"http:\/\/astronomy.lamost.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/astronomy.lamost.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=615"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/astronomy.lamost.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}